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Diesel fuel froze, difficult start of the diesel engine at low ambient temperature

  1. Application of diesel fuel does not correspond to seasons or climatic zones, and also applies diesel fuel that does not meet performance standards (high paraffin content). The reason for freezing diesel fuel is the presence of paraffin (paraffin) hydrocarbons. At low temperature paraffin starts to crystallize. As a result, diesel fuel thickens and gets viscous. The smallest crystals of paraffin clog the fuel filters, accumulating in pipes and blocking the distribution of fuel to the bottles.
  2. Presence of moisture in diesel fuel. The humidity in diesel fuel can cause the failure of the fuel delivery to low-temperature motor cylinders. At the positive water temperature and the emulsion formation fuel destroys the filter cartridge of the main filter, and at freezing temperatures the ice crystals block the fuel filters.



  1. 1. In case diesel fuel, not corresponding to the season, climatic zone or performance standards is applied by necessity, it is recommended to introduce one of the special depressor agents into the diesel fuel before the decrease of ambient temperature:
    • Antigel + superconcentrate at the ratio of 1:1000 for diesel fuel
    • Antigel - superconcentrated diesel fuel treatment
    • Antigel – agent for improvement of low-temperature properties of diesel fuel
    Application of these agents according to the application instructions allows to decrease the diesel fuel pour point by 10…12 °С and cold filter plugging point by 8…10 °С.

    Note: It often happens, that summer diesel fuels are mixed with jet fuel, liquid petroleum oil or gasoline to decrease the pour point. It leads to the decrease of cetane rating of fuel and further breakdown of the engine and fuel pump. Besides such “winter solar oil” has a very low flash point, which increases the flammability of diesel fuel.
  2. For binding and removing moisture from diesel fuel regular application of one of the special cleaners for fuel systems of diesel engines is recommended:
    • Verylube fuel system cleaner (Diesel)
    • DIESEL-LUX – complex treatment
    • MultiCleaner (Diesel) - fuel system cleaner for diesel engine
    • F8 Complex Formula (Diesel) – diesel engine protection
    • - from the consequences of low-quality fuel application.